Thiadiazabicyclononane derivatives, processes for their production and herbicidal compositions

ABSTRACT

As a herbicide 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) compound having the formula: ##STR1## wherein Y represents halogen, hydroxyl, alkyl, alkoxy which may be substituted by halogen, alkenyloxy, alkynyloxy, phenoxy, cycloalkyloxy, alkoxycarbonylalkyloxy alkoxycarbonylalkenyloxy, alkythiocarbonylalkyloxy, alkynyloxycarbonylalkyloxy, benzyloxycarbonylalkyloxy, trifluoromethyl, benzyloxy, alkenyl, cyanoalkyl, alkylcarbomoyloxy, benzyl, alkoxyalkyl, alkynyloxyalkyl, cycloalkylmethyloxy, alkoxyalkyloxy, phenethyloxy, cycloalkyloxycarbonylalkyloxy, pyrrolidinocarbonyl, phenylcarbonyl, ##STR2## n is an integer of from 0 to 3; and X is oxygen or sulfur.

The present invention relates to novel 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) derivatives, processes for their production and herbicidal compositions containing them.

In recent years, a number of herbicides have been developed and actually used, and they have contributed to the reduction of the agricultural work load and to the improvement of the productivity. As a herbicide having a hetero ring, Ronstar [i.e. 5-t-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazoline-2-one] is widely used. However, Ronstar has drawbacks that it is likely to bring about phytotoxicity, and it is not effective against perennial weeds, particularly against Sagitaria pygmaea. Accordingly, a development of a herbicide having improved effectiveness and safety has been desired.

Under the circumstances, the present inventors have conducted extensive researches with an aim to develop a herbicide which satisfies the following conditions, and have finally accomplished the present invention.

(1) It is effective at a low dose.

(2) It is effective against paddy field weeds and (or) against upland field weeds.

(3) It is also effective against perennial weeds.

(4) It is effective in a wide range covering the germination stage to the growing stage.

(5) It has excellent residual effects and can be expected to provide stabilized effects.

(6) It exhibits excellent herbicidal effects.

(7) It is highly safe to crop plants.

Thus, the present invention provides a 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) derivative having the formula: ##STR3## wherein Y which may be the same or different, represents halogen, hydroxy, alkyl, alkoxy which may be substituted by halogen, alkenyloxy which may be substituted by halogen, alkynyloxy, phenoxy, cycloalkyloxy, alkoxycarbonylalkyloxy, alkoxycarbonylalkenyloxy, alkylthiocarbonylalkyloxy, alkynyloxycarbonylalkyloxy, benzyloxycarbonylalkyloxy, trifluoromethyl, benzyloxy which may be substituted by chlorine or alkyl, alkenyl, cyanoalkyl, alkylcarbamoyloxy, benzyl which may be substituted by one or two alkyl, alkoxyalkyl, alkynyloxyalkyl, cycloalkylmethyloxy which may be substituted by halogen, alkoxyalkyloxy, phenethyloxy, cycloalkyloxycarbonylalkyloxy, pyrrolidinocarbonyl, phenylcarbonyl which may be substituted by alkyl, ##STR4## [wherein R₁ is hydrogen, alkyl, phenyl, cycloalkyl, alkoxyalkyl, alkoxycarbonylalkyl or ##STR5## (wherein R₂ is hydrogen or alkoxy), X is oxygen or sulfur], ##STR6## (wherein R₃ is alkyl, alkenyl or alkynyl, and m is 0 or 2), ##STR7## [wherein R₄ is hydrogen or alkyl, and R₅ is hydrogen, alkyl, alkoxyalkyl, tetrahydrofurfuryl, alkoxyalkyloxyalkyl, alkoxycarbonylalkyl, cycloalkyl or --N═C(CH₃)--R₆ (wherein R₆ is alkyl or phenyl)], --NHR₇ (wherein R₇ is alkylcarbonyl or alkoxycarbonylalkyl), ##STR8## (wherein R₈ is hydrogen or alkyl, and R₉ is alkoxy, cycloalkyloxy or 1-pyrrolidinyl), or ##STR9## (wherein X is as defined above); n is an integer of from 0 to 3; and X is oxygen or sulfur.

The present invention also provides a process for producing a 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) derivative having the formula: ##STR10## wherein Z which may be the same or different, represents halogen, alkyl, alkoxy which may be substituted by halogen, alkenyloxy which may be substituted by halogen, alkynyloxy, phenoxy, cycloalkyloxy, alkoxycarbonylalkyloxy, alkylthiocarbonylalkyloxy, alkynyloxycarbonylalkyloxy, benzyloxycarbonylalkyloxy, trifluoromethyl, benzyloxy which may be substituted by chlorine or alkyl, alkenyl, cyanoalkyl, alkylcarbamoyloxy, benzyl which may be substituted by one or two alkyl, alkoxyalkyl, alkynyloxyalkyl, cycloalkylmethyloxy, alkoxyalkyloxy, phenethyloxy, cycloalkyloxycarbonylalkyloxy, pyrrolidinocarbonyl, phenylcarbonyl which may be substituted by alkyl, ##STR11## [wherein R₁ is hydrogen, alkyl, phenyl, cycloalkyl, alkoxyalkyl, alkoxycarbonylalkyl or ##STR12## (wherein R₂ is hydrogen or alkoxy), X is oxygen or sulfur], ##STR13## (wherein R₃ is alkyl, alkenyl or alkynyl, and m is 0 or 2), ##STR14## [wherein R₄ is hydrogen or alkyl, and R₅ is hydrogen, alkyl, alkoxyalkyl, tetrahydrofurfuryl, alkoxyalkyloxyalkyl, alkoxycarbonylalkyl, cycloalkyl or --N═C(CH₃)--R₆ (wherein R₆ is alkyl or phenyl)], --NHR₇ (wherein R₇ is alkylcarbonyl), ##STR15## (wherein R₈ is hydrogen or alkyl, and R₉ is alkoxy, cycloalkyloxy or 1-pyrrolidinyl), or ##STR16## (wherein X is as defined above); n is an integer of from 0 to 3; and X is oxygen or sulfur, which comprises reacting a compound of the formula: ##STR17## wherein Z and n are as defined above, with a compound of the formula:

    CXCl.sub.2

wherein X is as defined above.

Further, the present invention provides a process for producing a 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) derivative having the formula: ##STR18## wherein W which may be the same or different, represents halogen; R is alkyl which may be substituted by halogen, alkenyl which may be substituted by halogen, alkynyl, alkoxycarbonylalkyl, alkoxycarbonylalkenyloxy, alkylthiocarbonylalkyl, alkynyloxycarbonylalkyl, benzyloxycarbonylalkyl, benzyl which may be substituted by chlorine or alkyl, alkylcarbamoyl, cycloalkylmethyl which may be substituted by halogen, phenethyl, ##STR19## [wherein R₄ is hydrogen or alkyl, and R₅ is alkyl, alkoxyalkyl, tetrahydrofurfuryl, alkoxyalkyloxyalkyl, alkoxycarbonylalkyl, cycloalkyl or --N═C(CH₃)--R₆ (wherein R₆ is alkyl or phenyl)], or ##STR20## (wherein X is oxygen or sulfur); n is an integer of from 0 to 3; and X is oxygen or sulfur, which comprises reacting a compound of the formula: ##STR21## wherein W, X and n are as defined above, with a compound of the formula RT wherein R is as defined above, and T is halogen.

Furthermore, the present invention provides a herbicidal composition comprising a herbicidally effective amount of a compound of the formula I as defined above and a carrier.

Now, the present invention will be described in detail with reference to the preferred embodiments.

In the accompanying drawings:

FIG. 1 is the infrared absorption spectrum of Compound No. 3.

FIG. 2 is the infrared absorption spectrum of Compound No. 6.

FIG. 3 is the infrared absorption spectrum of Compound No. 7.

FIG. 4 is the infrared absorption spectrum of Compound No. 8.

FIG. 5 is the infrared absorption spectrum of Compound No. 9.

FIG. 6 is the infrared absorption spectrum of Compound No. 16.

FIG. 7 is the infrared absorption spectrum of Compound No. 24.

FIG. 8 is the infrared absorption spectrum of Compound No. 25.

FIG. 9 is the infrared absorption spectrum of Compound No. 28.

FIG. 10 is the infrared absorption spectrum of Compound No. 33.

FIG. 11 is the infrared absorption spectrum of Compound No. 36.

FIG. 12 is the infrared absorption spectrum of Compound No. 39.

FIG. 13 is the infrared absorption spectrum of Compound No. 48.

FIG. 14 is the infrared absorption spectrum of Compound No. 49.

FIG. 15 is the infrared absorption spectrum of Compound No. 50.

FIG. 16 is the infrared absorption spectrum of Compound No. 51.

FIG. 17 is the infrared absorption spectrum of Compound No. 52.

FIG. 18 is the infrared absorption spectrum of Compound No. 55.

FIG. 19 is the infrared absorption spectrum of Compound No. 56.

FIG. 20 is the infrared absorption spectrum of Compound No. 59.

FIG. 21 is the infrared absorption spectrum of Compound No. 75.

FIG. 22 is the infrared absorption spectrum of Compound No. 84.

FIG. 23 is the infrared absorption spectrum of Compound No. 86.

FIG. 24 is the infrared absorption spectrum of Compound No. 96.

FIG. 25 is the infrared absorption spectrum of Compound No. 102.

FIG. 26 is the infrared absorption spectrum of Compound No. 144.

FIG. 27 is the infrared absorption spectrum of Compound No. 147.

FIG. 28 is the infrared absorption spectrum of Compound No. 148.

FIG. 29 is the infrared absorption spectrum of Compound No. 149.

FIG. 30 is the infrared absorption spectrum of Compound No. 150.

FIG. 31 is the infrared absorption spectrum of Compound No. 151.

FIG. 32 is the infrared absorption spectrum of Compound No. 152.

FIG. 33 is the infrared absorption spectrum of Compound No. 153.

FIG. 34 is the infrared absorption spectrum of Compound No. 155.

FIG. 35 is the infrared absorption spectrum of Compound No. 157.

In the formula I, Y is preferably halogen, alkoxy which may be substituted by halogen, alkenyloxy which may be substituted by halogen, alkynyloxy, phenoxy, benzyloxy which may be substituted by chlorine or alkyl, ##STR22## [wherein R₁ is hydrogen, alkyl, phenyl, cycloalkyl, alkoxyalkyl, alkoxycarbonylalkyl or ##STR23## (wherein R₂ is hydrogen or alkoxy), X is oxygen or sulfur], ##STR24## [wherein R₄ is hydrogen or alkyl, and R₅ is hydrogen, alkyl, alkynyl, benzyl, alkoxyalkyl, tetrahydrofurfuryl, alkoxyalkyloxyalkyl, alkoxycarbonylalkyl, cycloalkyl or --N═C(CH₃)R₆ (wherein R₆ is alkyl or phenyl)].

A compound having the formula: ##STR25## wherein A is hydrogen or halogen, B is halogen, and R₅ is hydrogen, alkyl, alkynyl, benzyl, alkoxyalkyl, tetrahydrofurfuryl, alkoxyalkyloxyalkyl, alkoxycarbonylalkyl, cycloalkyl, or --N═C(CH₃)R₆ (wherein R₆ is alkyl or phenyl), is effective particularly as a herbicide for a soybean field. Particularly preferred in this respect is a compound of the formula: ##STR26## wherein A is hydrogen or halogen, B is halogen, and R₁₀ is hydrogen, alkyl, alkynyl, alkoxyalkyl, alkoxyalkyloxyalkyl, or tetrahydrofurfuryl.

As a herbicide for a non-agricultural field, a compound of the formula: ##STR27## wherein A is hydrogen or halogen, B is halogen, and R₁ is hydrogen, alkyl, phenyl, cycloalkyl, alkoxyalkyl, alkoxycarbonylalkyl or ##STR28## (wherein R₂ is hydrogen or alkoxy), is particularly useful. Particularly preferred in this respect is a compound having the formula: ##STR29## wherein Hal is halogen, and R₁₁ is hydrogen or alkyl.

Typical examples of the compound of the formula I are presented in Table 1.

                  TABLE 1                                                          ______________________________________                                         Com-                                                                           pound                                                                          No.   X     Y.sub.n                                                            ______________________________________                                         1     O     H                                                                  2     O     2-CH.sub.3                                                         3     O     2-OCH.sub.3                                                        4     O     2-F                                                                5     O     2-Cl                                                               6     O     3-CH.sub.3                                                         7     O     3-Cl                                                               8     O     3-CF.sub.3                                                         9     O     4-CH.sub.3                                                         10    O     4-OCH.sub.3                                                        11    O     4-F                                                                12    O     4-Cl                                                               13    O     4-Br                                                               14    O     4-I                                                                15    O     4-OCH.sub.2C.sub.6 H.sub.4Cl (para)                                16    O     2-F, 4-Cl                                                          17    O     2-F, 4-Br                                                          18    O     3-OCH.sub.3, 4-Cl                                                  19    O     3-OC.sub.2 H.sub.5, 4-Cl                                           20    O     3-OC.sub.3 H.sub.7 -n, 4-Cl                                        21    O     3-OC.sub.3 H.sub.7 -i, 4-Cl                                        22    O     3-OCH.sub.2 CHCH.sub.2, 4-Cl                                       23    O     3-OCH.sub.2 CCH, 4-Cl                                              24    O     3-OC.sub.4 H.sub.9 -s, 4-Cl                                        25    O     3-Cyclopentoxy, 4-Cl                                               26    O     3-OC.sub.6 H.sub.5, 4-Cl                                           27    O     3-OCH.sub.2C.sub.6 H.sub.5, 4-Cl                                   28    O     3-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.5, 4-Cl                       29    O     3-OCH.sub.2 CO.sub.2 C.sub.2 H.sub.5, 4-Cl                         30    O     3,4-Cl.sub.2                                                       31    O     3-OCH.sub.3, 4-Br                                                  32    O     3-OCH.sub.2 CCH, 4-Br                                              33    O     2-F, 4-Cl, 5-OC.sub.3 H.sub.7 -i                                   34    O     2-F, 4-Cl, 5-OCH.sub.2 CHCH.sub.2                                  35    O     2-F, 4-Cl, 5-OCH.sub.2 CCH                                         36    O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.5                  37    O     2-F, 4-Cl, 5-OCH.sub.2C.sub.6 H.sub.5                              38    O     2-F, 4-Cl, 5-OC.sub.6 H.sub.5                                      39    O     2,4-Cl.sub.2, 5-OC.sub.3 H.sub.7 -i                                40    O     2,4-Cl.sub.2, 5-OC.sub.6 H.sub.5                                   41    S     4-Cl                                                               42    S     3-OC.sub.3 H.sub.7 -i, 4-Cl                                        43    S     2-F, 4-Cl, 5-OC.sub.3 H.sub.7 -i                                   44    S     2-F, 4-Cl, 5-OC.sub.6 H.sub.5                                      45    S     2,4-Cl.sub.2, 5-OC.sub.3 H.sub.7 -i                                46    O     3-OH, 4-Cl                                                         47    O     2-F, 4-Cl, 5-OCH.sub.2 CO.sub.2 C.sub.2 H.sub.5                    48    O     3-OC.sub.4 H.sub.9 -n, 4-Cl                                        49    O     2-F, 4-Cl, 5-OC.sub.4 H.sub.9 -s                                   50    O     3-OCH(CH.sub.3)CO.sub.2CH.sub.2 CCH, 4-Cl                          51    O     3-OC.sub.5 H.sub.11 -n, 4-Cl                                       52    O     3-OC.sub.5 H.sub.11 -s, 4-Cl                                       53    O     3-OC.sub.4 H.sub.9 -i, 4-Cl                                        54    O     4-CF.sub.3                                                         55    O     3-OC.sub.8 H.sub.17 -n, 4-Cl                                       56    O     3-OCH(CH.sub.3)CO.sub.2CH.sub.2C.sub.6 H.sub.5, 4-Cl               57    O     3-OCH.sub.2 CHCHCH.sub.3, 4-Cl                                     58    O     3-OC.sub.3 H.sub.7 -i, 4-Br                                        59    O     3-OCH(CH.sub.3)CO.sub.2C.sub.4 H.sub.9 -n, 4-Cl                    60    O     3-OC.sub.2 H.sub.4 CHCH.sub.2, 4-Cl                                61    O     3-OCH.sub.2 C(CH.sub.3)CH.sub.2, 4-Cl                              62    O     3-OCH.sub.2C.sub.6 H.sub.4Cl (para), 4-Cl                          63    O     3-OC.sub.4 H.sub.9 -i, 4-Br                                        64    O     3-OCH.sub.2 CHCH.sub.2, 4-Br                                       65    O     3-OCH.sub.2C.sub.6 H.sub.4Cl (ortho), 4-Cl                         66    O     3-OCH.sub.2C.sub.6 H.sub.4CH.sub.3 (para), 4-Cl                    67    O     2-F, 4-Cl, 5-CH.sub.2 OCH.sub.3                                    68    O     3-OCH.sub.2 CHC(CH.sub.3).sub.2, 4-Cl                              69    O     3-OCH(CH.sub.3)COSC.sub.2 H.sub.5, 4-Cl                            70    O     3-OCH(CH.sub.3)CO.sub.2C.sub.4 H.sub.9 -i, 4-Cl                    71    O     3-OCH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.4 OCH.sub.3, 4-Cl            72    O     3-NHCH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.5, 4-Cl                     73    O     3-OC.sub.2 H.sub.4 Cl, 4-Cl                                        74    O     3-OCH.sub.2C.sub.6 H.sub.4Cl (metha), 4-Cl                         75    O     3-OCH(CH.sub.3)C.sub.6 H.sub.5, 4-Cl                               76    O     3-CH.sub.2 OC.sub.2 H.sub.5, 4-Cl                                  77    O     3-Cyclohexyloxy, 4-Cl                                              78    O     3-Cyclohexyimethyloxy, 4-Cl                                        79    O     3-OC.sub.2 H.sub.4 CCH, 4-Cl                                       80    O     3-(1-Cyclohexyloxycarbonylethoxy), 4-Cl                            81    O     3-OCH(CH.sub.3)CHCH.sub.2, 4-Cl                                    82    O     2-F, 4-Cl, 5-OCH.sub.2C.sub.6 H.sub.4Cl (para)                     83    O     2-Br, 4-Cl, 5-OCH.sub.2 CO.sub.2 C.sub.2 H.sub.5                   84    O     3-OCH(CH.sub.3)CO.sub.2 NC(CH.sub.3).sub.2, 4-Cl                   85    O     3-OPO(OC.sub.2 H.sub.5).sub.2, 4-Cl                                86    O     2,4-Cl.sub.2, 5-OCH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.5              87    O     3-CH.sub.2 OCH.sub.2 CCH, 4-Cl                                     88    O     3-OCONHC.sub.2 H.sub.5, 4-Cl                                       89    O     3-NHCOC.sub.2 H.sub.5, 4-Cl                                        90    O     3-OCONHCH.sub.3, 4-Cl                                              91    O     3,5-Cl.sub.2                                                       92    O     3-OCH(CH.sub.3)CO.sub.2NC(CH.sub.3)C.sub.6 H.sub.5, 4-Cl           93    O     3-CH.sub.2C.sub.6 H.sub.5, 4-Cl                                    94    O     3-OCH.sub.2 CHCHCl, 4-Cl                                           95    O     3-CO.sub.2 C.sub.2 H.sub.5, 4-Cl                                   96    O     3-COC.sub.6 H.sub.5, 4-Cl                                          97    O     3-CO.sub.2C.sub.3 H.sub.7 -i, 4-Cl                                 98    O     3-CO.sub.2C.sub.4 H.sub.9 -n, 4-Cl                                 99    O     3-C.sub.3 H.sub.7 -n, 4-Cl                                         100   O     3-CH.sub.2C.sub.6 H.sub.4CH.sub.3 (para), 4-Cl                     101   O     3-CH.sub.2C.sub.6 H.sub.3(CH.sub.3).sub.2 (2,5), 4-Cl              102   O     3-COC.sub.6 H.sub.4CH.sub.3 (para), 4-Cl                           103   O     3-CHCHCH.sub.3, 4-Cl                                               104   O     3-SC.sub.2 H.sub.5, 4-Cl                                           105   O     3-SO.sub.2 C.sub.2 H.sub.5, 4-Cl                                   106   O     3-Pyrrolidinocarbonyl, 4-Cl                                        107   O     3-CO.sub.2CH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.5, 4-Cl               108   O     3-CO.sub.2C.sub.2 H.sub.4 OCH.sub.3, 4-Cl                          109   O     3-SCH.sub.2 CHCH.sub.2, 4-Cl                                       110   O     3-SCH.sub.2 CCH, 4-Cl                                              111   O     3-SO.sub.2 CH.sub.2 CHCH.sub.2, 4-Cl                               112   O     2-F, 4-Cl, 5-CO.sub.2 C.sub.2 H.sub.5                              113   O     3-Cyclopentoxycarbonyl, 4-Cl                                       114   O     3-COSC.sub.2 H.sub.5, 4-Cl                                         115   O     3-CH.sub.2 CN, 4-Cl                                                116   O     3-CO.sub.2C.sub.6 H.sub.5, 4-Cl                                    117   O     3-CO.sub.2CH.sub.2C.sub.6 H.sub.5, 4-Cl                            118   O     3-OCH.sub.2 CHCCl.sub.2, 4-Cl                                      119   O     2-F, 4-Cl, 5-CO.sub.2CH.sub.2 C.sub.6 H.sub.4OCH.sub.3                         (para)                                                             120   O     2-F, 4-Cl, 5-CO.sub.2 H                                            121   O     2-F, 4-Cl, 5-CO.sub.2C.sub.3 H.sub.7 -i                            122   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2 CH.sub.3                        123   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.3 H.sub.7 -i               124   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.4 H.sub.9 -i               125   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2CH.sub.2 CCH                     126   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2NC(CH.sub.3).sub.2               127   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2NC.(CH.sub.3)C.sub.6                         H.sub.5                                                            128   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.4 OCH.sub.3        129   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.4OC.sub.2                      H.sub.5                                                            130   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.4OC.sub.3                      H.sub.7 -i                                                         131   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.4OC.sub.4                      H.sub.9 -n                                                         132   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.2 H.sub.4OC.sub.2                      H.sub.4 OCH.sub.3                                                  133   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2CH.(CH.sub.3)CH.sub.2                        OCH.sub.3                                                          134   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2C.sub.3 H.sub.6OC.sub.2                      H.sub.5                                                            135   O     2-F, 4-Cl, 5-(1-Tetrahydrofurfuryloxy-                                         carbonylethoxy)                                                    136   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2CH.sub.2CO.sub.2 C.sub.2                     H.sub.5                                                            137   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2CH.(CH.sub.3)CO.sub.2                        CH.sub.3                                                           138   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2CH.(CH.sub.3)CO.sub.2                        C.sub.2 H.sub.5                                                    139   O     3-OPS(OC.sub.2 H.sub.5).sub.2, 4-Cl                                140   O     3-OC.sub.2 H.sub.4 C.sub.6 H.sub.5, 4-Cl                           141   O     3-OC.sub.2 H.sub.4 OCH.sub.3, 4-Cl                                 142   O     3-CH.sub.3, 4-Cl                                                   143   O     3-OCH.sub.2 CClCH.sub. 2, 4-Cl                                     144   O     3-(2,2-Dichlorocyclopropylmethoxy), 4-Cl                           145   O                                                                                     ##STR30##                                                         146   O                                                                                     ##STR31##                                                         147   O     2-F, 4-Cl, 5-SCH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.5                 148   O                                                                                     ##STR32##                                                         149   O     2-F, 4-Cl, 5-SCH(CH.sub.3)CO.sub.2 C.sub.2 H.sub.5                 150   O                                                                                     ##STR33##                                                         151   O     2-F, 4-Cl, 5-SCH(C.sub.2 H.sub.5)CO.sub.2 C.sub.2 H.sub.5          152   O                                                                                     ##STR34##                                                         153   O     2-F, 4-Cl, 5-SCH(C.sub.3 H.sub.7)CO.sub.2 C.sub.2 H.sub.5          154   O                                                                                     ##STR35##                                                         155   O                                                                                     ##STR36##                                                         156   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CO.sub.2 H                               157   O     2-F, 4-Cl, 5-OCH(CH.sub.3)CHCHCO.sub.2 C.sub. 2 H.sub.5            158   O     2-F, 4-Cl, 5-CO.sub.2 CH.sub.3                                     159   O     2-F, 4-Cl, 5-CO.sub.2 C.sub.3 H.sub.7 -n                           160   O     2-F, 4-Cl, 5-CO.sub.2 C.sub.4 H.sub.9 -n                           ______________________________________                                    

The melting points and refractive indexes of the Compound Nos. 1 to 157 are shown in Table 2.

                  TABLE 2                                                          ______________________________________                                         Compound                                                                       No.       Melting point (°C.)                                                                     Refractive index n.sub.D.sup.20                      ______________________________________                                          1        78-82                                                                 2        74-78                                                                 3                        1.6124                                                4        83-85                                                                 5        73-75                                                                 6                        1.6208                                                7                        1.6368                                                8                        1.5641                                                9                        1.6256                                               10        116-119                                                              11        69-72                                                                12        82-85                                                                13        69-70                                                                14        80-82                                                                15        150-154                                                              16                        1.6121                                               17         98-100                                                              18        125-128                                                              19        143-145                                                              20        102-105                                                              21        66-69                                                                22        119-122                                                              23        130-132                                                              24                        1.5794                                               25                        1.6145                                               26        83-85                                                                27        114-116                                                              28                        1.5840                                               29        94-96                                                                30        116-118                                                              31        118-121                                                              32        132-135                                                              33                        Not measurable                                       34        106-109                                                              35        132-134                                                              36                        1.5666                                               37         99-101                                                              38        116-119                                                              39                        1.6050                                               40        111-114                                                              41        96-97                                                                42         98-101                                                              43        77-80                                                                44        138-141                                                              45        71-73                                                                46        130-132                                                              47        93-96                                                                48                        1.6050                                               49                        Not measurable                                       50                        1.5915                                               51                        1.5951                                               52                        1.5878                                               53        72-75                                                                54        103-107                                                              55                        1.5673                                               56                        1.5961                                               57        83-86                                                                58        84-88                                                                59                        1.5732                                               60        77-78                                                                61        89-95                                                                62        94-96                                                                63        92-95                                                                64        116-119                                                              65        100-103                                                              66        162-164                                                              67        84-87                                                                68        78-81                                                                69                        1.5962                                               70                        1.5661                                               71                        1.5710                                               72                        1.5755                                               73        110-114                                                              74        120-122                                                              75                        Not measurable                                       76        73-76                                                                77                        1.6043                                               78         97-103                                                              79        85-88                                                                80                        1.5771                                               81                        1.5970                                               82        129-132                                                              83        116-118                                                              84                        Not measurable                                       85                        1.5759                                               86                        Not measurable                                       87                        1.6946                                               88        143-146                                                              89        117-120                                                              90        167-170                                                              91        111-114                                                              92        44-46                                                                93        154-156                                                              94        87-90                                                                95                        1.6043                                               96                        Not measurable                                       97                        1.5843                                               98                        1.5775                                               99                        1.5678                                               100                       1.6255                                               101       127-129                                                              102                       Not measurable                                       103                       1.6320                                               104       120-122                                                              105                       1.6213                                               106       119-121                                                              107                       1.5881                                               108                       1.5936                                               109       66-68                                                                110                       1.6641                                               111                       1.6225                                               112                       1.6002                                               113                       1.5979                                               114                       1.6321                                               115       120-122                                                              116                       1.6297                                               117                       1.6024                                               118                       1.6058                                               119                       1.6052                                               120       223-226                                                              121                       1.5734                                               122       106-109                                                              123                       1.5549                                               124       69-72                                                                125                       1.5735                                               126       116-119                                                              127       52-55                                                                128                       1.5749                                               129                       1.5678                                               130                       1.5590                                               131                       1.5575                                               132                       1.5672                                               133                       1.5580                                               134                       1.5691                                               135                       1.5751                                               136                       1.5690                                               137                       1.5647                                               138                       1.5538                                               139                       1.5995                                               140       115-118                                                              141       68-71                                                                142       82-84                                                                143       77-79                                                                144                       Not measurable                                       145                       1.5969                                               146                       1.5972                                               147                       1.5990                                               148                       Not measurable                                       149                       1.5925                                               150                       1.602                                                151                       1.5738                                               152                       1.5963                                               153                       1.5761                                               154       136-138                                                              155                       Not measurable                                       156       120-122                                                              157                       Not measurable                                       158       79-81                                                                159       57-59                                                                160                       1.5791                                               ______________________________________                                    

The compound of the formula I may be prepared by the following processes. ##STR37## wherein X, Z and n are as defined above. This process can be conducted by reacting the compound of the formula II with the compound of the formula III in the presence of a base.

As the base, there may be mentioned an aliphatic tertiary amine such as triethylamine or trimethylamine; an aromatic tertiary amine such as pyridine, picoline or quinoline; or an inorganic base such as sodium hydroxide, potassium hydroxide, potassium carbonate or sodium carbonate.

The above reaction is preferably conducted in a solvent. As such a solvent, there may be mentioned a chlorine-containing hydrocarbon such as dichloromethane, chloroform or carbon tetrachloride; an ether such as diethyl ether, tetrahydrofuran or dioxane; a hydrocarbon such as n-hexane, benzene or toluene; an aliphatic ketone such as acetone or methyl ethyl ketone; dimethylsulfoxide; or N,N-dimethylformamide.

The above-mentioned condensation reaction can be completed in from 1 to 7 hours at a temperature within a range of from -20° C. to the boiling point of the solvent. ##STR38## wherein X, W, R and n are as defined above.

This process can be conducted by reacting the compound of the formula V with an acid such as hydrobromic acid or aluminum chloride in the presence of a solvent, for instance, a fluorine-containing hydrocarbon such as chloroform or carbon tetrachloride, or a hydrocarbon such as benzene or toluene. This reaction can be completed in from 1 to 7 hours at a temperature within a range of from 0° C. to the boiling point of the solvent. ##STR39## wherein W, X, R, T and n are as defined above.

This process can be conducted by reacting the compound of the formula VI with the compound of the formula VII in the presence of the same base and solvent as used in process (a) at a temperature within a range of from -20° C. to the boiling point of the solvent for from 1 to 7 hours.

Now, the present invention will be described in further detail with reference to Examples. However, it should be understood that the present invention is by no means restricted by these specific Examples.

Firstly, Examples for the preparation of the compounds of the present invention will be described.

Preparation Example 1 9-(4-Chlorophenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 12)

In a reaction flask, 3.2 g (13 mmol) of 1,2-tetramethylene-1-(4-chlorophenylthiocarbamoyl)-hydrazine, 2.2 g (28 mmol) of pyridine ad 20 ml of dichloromethane, were charged, and a dichloromethane solution containing 1.5 g (15 mmol) of phosgene was dropwise added while cooling the mixture with ice water. After the dropwise addition, the mixture was stirred at room temperature for 3 hours to complete the reaction. The reaction solution was washed with water, and dried over anhydrous sodium sulfate, and then the solvent was distilled off to obtain a crude product. This crude product was recrystallized from isopropyl ether to obtain 3.2 g (yield: 74%) of white crystals. Melting point: 82°-85° C.

Preparation Example 2 9-(4-Chlorophenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-thione (Compound No. 41)

Into a reaction flask, 2.4 g (9 mmol) of 1,2-tetramethylene-1-(4-chlorophenylthiocarbamoyl)-hydrazine, 2.0 g (25 mmol) of pyridine and 20 ml of dichloromethane, were charged, and 1.3 g (11 mmol) of thiophosgene was dropwise added while cooling the mixture with ice water. After the dropwise addition, the mixture was stirred at room temperature for 3 hours to complete the reaction. After the completion of the reaction, the reaction solution was washed with water, and dried over anhydrous sodium sulfate, and the solvent was distilled off to obtain a crude product. This crude product was recrystallized from isopropyl ether to obtain 2.1 g (yield: 75%) of brown crystals. Melting point: 96°-97° C.

Preparation Example 3 9-(4-Chloro-3-hydroxyphenylimino)8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 46)

Into a reaction flask equipped with a Dimroth condenser, 1.7 g (5 mmol) of 9-(4-chloro-3-isopropoxyphenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one, 1.3 g (10 mmol) of aluminum chloride and 50 ml of chloroform, were charged, and refluxed under heating for 2 hours to complete the reaction.

The reaction solution was poured into ice water, and the organic layer was washed with water and dried over anhydrous sodium sulfate, and the solvent was distilled off to obtain a crude product.

The crude product was purified by column chromatography to obtain 1.2 g (yield: 80%) of colorless crystals. Melting points: 130°-132° C.

Preparation Example 4 9-(4-Chloro-2-fluoro-3-propargyloxyphenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 35)

Into a reaction flask equipped with a Dimroth condenser, 2.2 g (7 mmol) of 9-(4-chloro-2-fluoro-3-hydroxyphenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one, 1.1 g (9 mmol) of propargyl bromide, 1.3 g (9 mmol) of potassium carbonate and 20 ml of acetonitrile, were charged, and refluxed under heating for 3 hours to complete the reaction.

The reaction solution was filtered, concentrated, extracted with ethyl acetate, and then washed with water and dried over anhydrous sodium sulfate. The solvent was distilled off to obtain a crude product, which was then recrystallized from isopropyl ether to obtain 1.6 g (yield: 64%) of white crystals. Melting point: 132°-134° C.

Preparation Example 5 9-(4-Chloro-2-fluoro-5-ethoxycarbonylphenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 112)

Into a reaction flask, 3.8 g (11 mmol) of 1,2-tetramethylene-1-(4-chloro-2-fluoro-5-ethoxycarbonylphenylthiocarbamoyl)hydrazine, 2.1 g (26 mmol) of pyridine and 20 ml of dichloromethane, were charged, and a dichloromethane solution containaing 1.3 g (13 mmol) of phosgene, was dropwise added while cooling the mixture with ice water. After the dropwise addition, the mixture was stirred at room temperature for 1 hour to complete the reaction. The reaction solution was washed with water and dried over anhydrous sodium sulfate, and then the solvent was distilled off to obtain a crude product. This crude product was purified by column chromatography to obtain 2.8 g (yield: 68%) of colorless sticky substance. Refractive index: n_(D) ²⁰ 1.6002.

Preparation Example 6 9-{4-Chloro-2-fluoro-5-(1-methoxyethoxycarbonylethoxy)phenylimino}-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 128)

Into a reaction flask equipped with a Dimroth condenser, 1.9 g (6 mmol) of 9-(4-chloro-2-fluoro-3-hydroxyphenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one, 1.3 g (6 mmol) of methoxyethyl 2-bromopropionate, 1.0 g (6 mmol) of potassium carbonate and 20 ml of acetonitrile, were charged, and refluxed under heating for 40 minutes to complete the reaction. The reaction solution was filtered, concentrated, extracted with ethyl ether, and then washed with water and dried over anhydrous sodium sulfate. The solvent was distilled off to obtian a crude product, which was purified by column chromatography to obtain 1.2 g (yield: 46.1%) of slightly brown liquid. Refractive index: n_(D) ²⁰ 1.5749

Preparation Example 7 9-{4-Chloro-3-[1-(ethoxycarbonyl)ethylamino]phenylimino}-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one (Compound No. 72)

Into a reaction flask equipped with a Dimroth condenser, 2.2 g (7.4 mmol) of 9-(4-chloro-3-aminophenylimino)-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-one, 15 ml of ethyl 2-bromopropionate and 2.0 g (24 mmol) of sodium hydrogen carbonate, were charged, and refluxed under heating for 4 hours to complete the reaction. The reaction solution was filtered, concentrated and extracted with ethyl acetate, and then washed with water and dried over anhydrous sodium sulfate. The solvent was distilled off to obtain a crude product, which was purified by column chromatography to obtain 1.5 g (yield: 52%) of colorless oily substance. Refractive index: n_(D) ²⁰ 1.5755

The 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) derivative of the formula I is useful as an active ingredient for a herbicide. When the compound of the formula I of the present invention is used as a herbicide for a paddy rice field, an upland field, an orchard or a non-agricultural field, the active ingredient can be used in a suitable formulation depending upon the particular purpose. Usually, the active ingredient is diluted with an inert liquid or solid carrier, and used in the form of a formulation such as a dust, a wettable powder, an emulsifiable concentrate, a granule, etc., if necessary by adding a surfactant and other additives. Further, the compound of the present invention may be used in combination with an insecticide, a nematocide, a fungicide, other herbicides, a plant growth controlling agent, a fertilizer, etc., as the case requires.

Now, the formulations will be described in detail with reference to typical Formulation Examples. In the following Formulation Examples, "parts" means "parts by weight".

Formulation Example 1 Wettable power

10.0 parts of Compound No. 43, 0.5 part of Emulgen (trademark of Kao Soap Co., Ltd.) 810, 0.5 part of Demol trademark of Kao Soap Co., Ltd.) N, 20.0 parts of Kunilite (trademark of Kunimine Kogyo K.K.) 201, and 69.0 parts of Zeeklite (trademark of Zeeklite Co., Ltd.) CA, were mixed and pulverized to obtain a wettable powder containing 10% of an active ingredient.

Formulation Example 2 Wettable powder

10.0 parts of Compound No. 33, 0.5 part of Emulgen 810, 0.5 part of Demol N, 20.0 parts of Kunilite 201, 5.0 parts of Carplex 80 and 64.0 parts of Zeeklite CA, were mixed and pulverized to obtain a wettable powder containing 10% of the active ingredient.

Formulation Example 3 Emulsifiable concentrate

To 30 parts of Compound No. 19, 60 parts of a mixture of xylene and isophorone in equal amounts and 10 parts of surfactant Sorpol (trademark of Toho Kagaku Kogyo K.K.) 800A, were added, and the mixture was thoroughly mixed to obtain 100 parts of an emulsifiable concentrate.

Formulation Example 4 Granules

10 parts of water was added to 10 parts of Compound No. 21, 80 parts of a filler obtained by mixing talc and bentonite in a ratio of 1:3, 5 parts of white carbon and 5 parts of surfactant Sorpol N 800A, and the mixture was thoroughly kneaded to obtain a paste, which was extruded from sieve openings having a diameter of 0.7 mm and dried, and then cut into a length of from 0.5 to 1 mm, to obtain 100 parts of granules.

The compounds of the formula of the present invention exhibit excellent herbicidal effects at a very low dose in a wide range from the germination stage to the growing stage of annual weeds such as barnyardgrass (Echinochloa crus-galli), umbrella-plant (Cyperus difformis L.), monochoria (Monochoria vaginalis Presl), spike-flowered rotala (Rotalal indica Koehne), false pimpernel (Lindernia procumbens Philcox) and Dopatrium junceum Hamilt, and perennial weeds such as bulrush (Scirpus juncoides Roxb.), slender spikerush (Eleocharis acicularis Roem. et Schult.), water plantain (Alisma canaliculatum A. Br. et Bouche), Sagittaria (Sagittaria pygmaea Miq.) and cyperus sp. (Cyperus serotinus Rottb.) which grow in paddy fields. At the same time, they have high selectivity for paddy field rice. Further, they exhibit high herbicidal effects, by soil treatment or by foliage treatment, against various weeds in the upland fields, for example, broad leaf weeds such as smart weed (Polygonum nodosum L.), pigweed (Amaranthus retroflexus), lambsquaters (Chenopodium album), common chickweed (Stellaria media), speed well (Veronica persica), wild mustard (Brassica kaber var. pinnatifida) and cocklebur (Xanthium strumarium), cyperaceous weeds such as rice flatsedge (Cyperus iria L.), and gramineous weeds such as barnyardgrass, large crabgrass (Digitaria sanguinalis) and green foxtail (Setaria viridis). At the same time, they have a feature that they are highly safe to crop plants such as upland rice, wheat, soybean and corn.

The dose of the compound of the present invention is usually within a range of from 10 g to 15 kg/ha. More specifically, the dose is usually from 30 g to 5 kg/ha for upland fields, from 10 g to 1 kg/ha for paddy rice fields, and from 200 g to 5 kg/ha for non-agricultural fields.

Further, the compounds of the present invention have excellent residual effects, and show stabilized effects for a long period of time also in paddy fields. They are also useful for orchard, grassland, lawn and non-agricultural fields.

Now, the herbicidal effects of the herbicides of the present invention will be described with reference to Text Examples.

Text Example 1 Herbicidal test by soil treatment of paddy field

Into a 100 cm² porcelain pot, paddy field soil was filled and puddled. Then, seeds of barnyardgrass, umbrella plant, monochoria and bulrush were sown, and water was introduced to a depth of 3 cm.

Next day, the wettable powder prepared in accordance with Formulation Example 1, was diluted with water and dropwise applied to the surface of the water. The amount of the active ingredient applied, was 400 g/10a. Then, the pot was left in a green house. Twenty one days after the application, the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 4.

                  TABLE 3                                                          ______________________________________                                         Index     Herbicidal effects and phytotoxicity                                 ______________________________________                                         5         Withered                                                             4.5       Herbicidal effect (or phytotoxicity) in a range                                of 90 to 99%                                                         4         Herbicidal effect (or phytotoxicity) in a range                                of 80 to 89%                                                         3.5       Herbicidal effect (or phytotoxicity) in a range                                of 70 to 79%                                                         3         Herbicidal effect (or phytotoxicity) in a range                                of 60 to 69%                                                         2.5       Herbicidal effect (or phytotoxicity) in a range                                of 50 to 59%                                                         2         Herbicidal effect (or phytotoxicity) in a range                                of 40 to 49%                                                         1.5       Herbicidal effect (or phytotoxicity) in a range                                of 30 to 39%                                                         1         Herbicidal effect (or phytotoxicity) in a range                                of 20 to 29%                                                         0.5       Herbicidal effect (or phytotoxicity) in a range                                of 1 to 19%                                                          0         No herbicidal effect (or no phytotoxicity)                           ______________________________________                                    

                  TABLE 4                                                          ______________________________________                                                Herbicidal effects                                                      Compound Barnyard- Umbrella                                                    No.      grass     plant    Monochoria                                                                               Bulrush                                  ______________________________________                                          1       4         5        5         4                                         2       2.5       2        5         3.5                                       3       4         5        5         2.5                                       4       4         4        5         4                                         6       4         5        5         3.5                                       7       5         5        5         4                                         8       3         4        5         5                                         9       5         5        5         5                                        10       5         5        5         5                                        11       5         5        5         5                                        12       5         5        5         5                                        13       5         5        5         5                                        14       5         5        5         5                                        15       4         4        5         5                                        16       5         5        5         5                                        17       5         5        5         5                                        18       5         5        5         5                                        19       5         5        5         5                                        20       5         5        5         5                                        21       5         5        5         5                                        22       5         5        5         5                                        23       5         5        5         5                                        24       5         5        5         5                                        25       5         5        5         5                                        26       5         5        5         5                                        27       5         5        5         5                                        28       5         5        5         5                                        29       5         5        5         5                                        30       5         5        5         5                                        31       5         5        5         5                                        32       5         5        5         5                                        33       5         5        5         5                                        34       5         5        5         5                                        35       5         5        5         5                                        36       5         5        5         5                                        37       5         5        5         5                                        38       5         5        5         5                                        39       5         5        5         5                                        40       5         5        5         5                                        41       5         5        5         5                                        42       5         5        5         5                                        43       5         5        5         5                                        44       5         5        5         5                                        45       5         5        5         5                                        46       5         5        5         5                                        47       5         5        5         5                                        48       5         5        5         5                                        49       5         5        5         5                                        50       5         5        5         5                                        51       5         5        5         5                                        52       5         5        5         5                                        53       5         5        5         5                                        54       5         5        5         5                                        55       5         5        5         5                                        ______________________________________                                    

Test Example 2 Low dose test in soil treatment of irrigated paddy field

Into a 1/5,000a Wagner pot, paddy field soil was filled and puddled, and water was introduced to a depth of 3 cm.

In pot A, three germinated tubers of each of flat sedge and sagittaria, were embedded in the surface layer of the soil, and two seedlings of two rice plants of 2.2 leaf stage, were transplanted in a depth of 2 cm.

In pot B, seeds of barnyardgrass, hardstem bulrush, narrow leaf water plantain, monochoria and umbrella plant were sown in the surface layer of the soil.

The day after the seeding and transplantation, a prescribed amount of a wettable powder of each compound formulated in accordance with Formulation Example 1, was diluted with water and dropwise applied by a pipette.

Thirty days after application, the herbicidal effect and phytotoxicity were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 5.

                                      TABLE 5                                      __________________________________________________________________________     Dose of                            (Part 2)                                    active      (Part 1)                              Transplanted                 Compound                                                                             ingredient                                                                           Barnyard-                                                                            Umbrella         Water     Cyperus                                                                             paddy field                  No.   (g/10 a)                                                                             grass plant                                                                               Monochoria                                                                            Bulrush                                                                             plantain                                                                            Sagittaria                                                                          sp   rice                         __________________________________________________________________________     13    50    5     5    5      4.5  5    5    5    0.5                                25    4.5   5    5      4    5    5    5    0                            18    50    5     5    5      5    5    5    5    0                                  25    5     5    5      5    5    5    5    0                            19    12.5  5     5    5      5    5    5    5    0                                  6.3   5     5    5      5    5    4.5  5    0                            20    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            21    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            22    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            23    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            24    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    4    5    0                            26    25    5     5    5      5    5    4    5    1                                  12.5  5     5    5      5    5    2    5    0                            30    50    5     5    5      5    5    5    5    0.5                                25    5     5    5      5    5    5    5    0                            31    50    5     5    5      5    5    5    5    0                                  25    5     5    5      5    5    5    5    0                            32    6.3   5     5    5      5    5    5    5    1                                  3.2   5     5    5      5    5    5    5    0.5                          33    6.3   5     5    5      5    5    5    5    0.5                                3.2   5     5    5      5    5    5    5    0                            34    6.3   5     5    5      5    5    5    5    1                                  3.2   5     5    5      5    5    5    5    0.5                          35    6.3   5     5    5      5    5    5    5    3.5                                3.2   5     5    5      5    5    5    5    3                            36    12.5  5     5    5      5    5    5    4    2                                  6.3   5     5    5      4    5    5    2    1                            37    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            38    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            39    25    5     5    5      5    5    5    5    1                                  12.5  5     5    5      3.5  5    5    2    0                            42    25    5     5    5      5    5    5    5    0                                  12.5  5     5    5      5    5    5    5    0                            43    12.5  5     5    5      5    5    5    5    0                                  6.3   5     5    5      5    5    5    5    0                            Ronstar                                                                              50    5     5    5      5    5    4.5  5    2                                  25    5     5    5      5    5    2.5  5    2                                  12.5  5     5    5      5    5    1.5  3    1                            __________________________________________________________________________

Text Example 3 The herbicidal test in soil treatment of upland field

Into a 120 cm² plastic pot, upland field soil was filled, and seeds of barnyardgrass, large crabgrass, smart weed, pigweed, lambsquaters and rice flatsedge were sown and covered with soil.

A wettable powder of each test compound formulated in accordance with Formulation Example 1, was diluted with water in an amount of 100 liter/10a and uniformly applied to the surface of soil by means of a small size spray at a dose of 400 g/10a of the active ingredient. After the application, the pot was left for 21 days in a green house, and then the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 6.

                  TABLE 6                                                          ______________________________________                                         Com-  Herbicidal effects                                                       pound Barnyard- Large    Smart Pig- Lambs-                                                                               Rice                                 No.   grass     crabgrass                                                                               weed  weed quaters                                                                              flatsedge                            ______________________________________                                          4    4         5        5     5    5     5                                    11    5         5        5     5    5     5                                    12    5         5        5     5    5     5                                    16    5         5        5     5    5     5                                    17    5         5        5     5    5     5                                    20    5         5        5     5    5     5                                    22    4         5        5     5    5     5                                    23    4         5        5     5    5     5                                    24    5         5        5     5    5     5                                    28    5         5        4     5    5     5                                    31    5         5        5     5    5     5                                    33    5         5        5     5    5     5                                    34    5         5        5     5    5     5                                    35    5         5        5     5    5     5                                    36    5         5        5     5    5     5                                    ______________________________________                                    

Text Example 4 The herbicidal test in foliage treatment in upland field

Into a 120 cm² plastic pot, upland field soil was filled, and seeds of barnyardgrass, large crabgrass, smart weed, pigweed, lambsquater and rice flatsedge, were sown, and grown in a green house until barnyardgrass grew to the 3 leaf stage. When barnyardgrass reached the 3 leaf stage, a wettable powder of each test compound formulated in accordance with Formulation Example 1 was diluted with water in an amount of 100 liter/10 a and applied to the foliage of the plants from above by a small size spray at a dose of 400 g/10 a of the active ingredient. After the application, the pot was left for 21 days in a green house, and then the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 7.

                  TABLE 7                                                          ______________________________________                                         Com-  Herbicidal effects                                                       pound Barnyard- Large    Smart Pig- Lambs-                                                                               Rice                                 No.   grass     crabgrass                                                                               weed  weed quaters                                                                              flatsedge                            ______________________________________                                          7    5         5        5     5    5     5                                    11    5         5        5     5    5     5                                    12    5         5        5     5    5     5                                    13    5         5        5     5    5     5                                    14    5         5        5     5    5     5                                    16    5         5        5     5    5     5                                    17    5         5        5     5    5     5                                    20    5         5        5     5    5     5                                    21    4         5        5     5    5     5                                    22    5         5        5     5    5     5                                    23    5         5        5     5    5     5                                    24    5         5        5     5    5     5                                    28    5         5        5     5    5     5                                    31    4         5        5     5    5     5                                    32    4         5        5     5    5     5                                    33    5         5        5     5    5     5                                    34    5         5        5     5    5     5                                    35    5         5        5     5    5     5                                    36    5         5        5     5    5     5                                    37    5         5        5     5    5     5                                    38    4         5        5     5    5     5                                    39    5         5        5     5    5     5                                    41    4         5        5     5    5     5                                    42    4         5        5     5    5     5                                    43    5         5        5     5    5     5                                    44    4         5        5     5    5     5                                    ______________________________________                                    

Text Example 5 Herbicidal test in the soil treatment of paddy rice field

Into a 10 cm² porcelain pot, paddy field soil was filled and puddled, and seeds of barnyardgrass, umbrella plant, monochoria and bulrush were sown. Then, water was introduced to the depth of 3 cm.

Next day, a wettable powder prepared in accordance with Formulation Example 1, was diluted with water and dropwise applied to the surface of water. The amount of the active ingredient applied was 400 g/10a. The pot was left in a green house, and twenty one days after the application, the herbicidal activities were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 8.

                  TABLE 8                                                          ______________________________________                                         Herbicidal effects                                                             Compound                                                                               Barnyard-  Umbrella                                                    No.     grass      plant    Monochoria                                                                               Bulrush                                  ______________________________________                                          56     5          5        5         5                                         57     5          5        5         5                                         58     5          5        5         5                                         59     5          5        5         5                                         60     5          5        5         5                                         61     5          5        5         5                                         62     5          5        5         5                                         63     5          5        5         5                                         64     5          5        5         5                                         65     5          5        5         5                                         66     5          5        5         5                                         67     5          5        5         5                                         68     5          5        5         5                                         69     5          5        5         5                                         70     5          5        5         5                                         71     5          5        5         5                                         72     5          5        5         5                                         73     5          5        5         5                                         74     5          5        5         5                                         75     5          5        5         5                                         76     5          5        5         5                                         77     5          5        5         5                                         78     5          5        5         5                                         79     5          5        5         5                                         80     5          5        5         5                                         81     5          5        5         5                                         82     5          5        5         5                                         84     5          5        5         5                                         85     5          5        5         5                                         86     5          5        5         5                                         87     5          5        5         5                                         88     5          5        5         5                                         89     5          5        5         5                                         90     5          5        5         5                                         92     5          5        5         5                                         93     5          5        5         5                                         94     5          5        5         5                                         95     5          5        5         5                                         96     5          5        5         5                                         97     5          5        5         5                                         98     5          5        5         5                                         99     5          5        5         5                                        100     5          5        5         5                                        102     5          5        5         5                                        103     5          5        5         5                                        104     5          5        5         5                                        105     5          5        5         5                                        106     5          5        5         5                                        107     5          5        5         5                                        108     5          5        5         5                                        109     5          5        5         5                                        110     5          5        5         5                                        111     5          5        5         5                                        112     5          5        5         5                                        113     5          5        5         5                                        114     5          5        5         5                                        115     5          5        5         5                                        122     5          5        5         5                                        123     5          5        5         5                                        124     5          5        5         5                                        125     5          5        5         5                                        126     5          5        5         5                                        127     5          5        5         5                                        128     5          5        5         5                                        129     5          5        5         5                                        130     5          5        5         5                                        131     5          5        5         5                                        132     5          5        5         5                                        133     5          5        5         5                                        136     5          5        5         5                                        137     5          5        5         5                                        138     5          5        5         5                                        139     5          5        5         5                                        140     5          5        5         5                                        141     5          5        5         5                                        142     5          5        5         5                                        143     5          5        5         5                                        144     5          5        5         5                                        ______________________________________                                    

Text Example 6 Low dose test in the soil treatment of irrigated paddy rice field

Into a 1/5,000a Wagner pot, paddy field soil was filled and puddled, and then water was introduced to a depth of 3 cm.

In pot A, three germinated tubers of each of water nutgrass and sagittaria, were embedded in the surface layer of the soil, and two seedlings of two paddy field rice plants of 2.2 leaf stage, were transplanted in a depth of 2 cm.

In pot B, seeds of barnyardgrass, bulrush, water plantain, monochoria and umbrella plant, were sown in the surface layer of the soil.

The day after the seeding and transplantation, a prescribed amount of a wettable powder of each compound formulated in accordance with Formulation Example 1, was diluted with water and dropwise applied by a pippet.

Thirty days after the application, the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 9.

                                      TABLE 9                                      __________________________________________________________________________           Dose of                                                                        active                                       Transplanted                Compound                                                                             ingredient                                                                           Barnyard-                                                                            Umbrella         Water           paddy field                 No.   (g/10 a)                                                                             grass plant                                                                               Monochoria                                                                            Bulrush                                                                             plantain                                                                            Sagittaria                                                                          Flat sedge                                                                           rice                        __________________________________________________________________________     57    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           58    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           59    25    5     5    5      5    5    5    5     1                           60    12.5  5     5    5      5    5    5    5     1                                 6.3   5     5    5      5    5    5    5     0                           61    50    5     5    5      5    5    5    5     0                                 25    5     5    5      5    5    5    5     0                           63    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           64    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           67    6.3   5     5    5      5    5    5    5     1                           68    50    5     5    5      5    5    5    5     0                                 25    5     5    5      5    5    4    5     0                           69    50    5     5    5      5    5    5    4     0                                 25    5     5    5      5    5    5    4     0                           72    50    5     5    5      5    5    5    5     1                           73    50    5     5    5      5    5    5    3     0                           76    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           77    25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           79    50    5     5    5      5    5    5    5     0                                 25    5     5    5      5    5    5    5     0                           81    50    5     5    5      5    5    5    5     0.5                               25    5     5    5      5    5    5    5     0.5                         94    25    5     5    5      5    5    5    5     1                                 12.5  5     5    5      5    5    4    4     1                           95    50    5     5    5      5    5    5    5     2                                 25    5     5    5      5    5    5    5     1                           98    50    5     5    5      5    5    5    5     0                           103   50    5     5    5      5    5    5    4     1                           122   25    5     5    5      5    5    5    5     0                                 12.5  5     5    5      5    5    5    5     0                           123   50    5     5    5      5    5    5    5     0                                 25    5     5    5      5    5    5    5     0                           124   50    5     5    5      5    5    5    5     1                                 25    5     5    5      5    5    5    5     0                           141   6.3   5     4    5      5    5    5    5     1                           143   50    5     5    5      5    5    5    5     0                                 25    5     5    5      5    5    5    5     0                           144   50    5     5    5      5    5    5    5     2                                 25    5     5    5      5    5    5    5     1                           Ronstar                                                                              50    5     5    5      5    5    5    5     2                                 25    5     5    5      5    5    2    5     2                                 12.5  5     5    5      5    5    1    2     1                           __________________________________________________________________________

Test Example 7 Herbicidal test in the soil treatment of upland field

To a 120 cm² plastic pot, upland field soil was filled and seeds of barnyardgrass, large crabgrass, smart weed, pigweed, lambsquater and rice flatsedge were sown and covered with soil. A wettable powder of each compound formulated in accordance with Formulation Example 1, was diluted with water in an amount of 100 liter/10a and uniformly applied to the surface of the soil by a small size spray at a dose of 400 g/10a of the active ingredient. After the treatment, the pot was left in a green house for 21 days, and then the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 10.

                  TABLE 10                                                         ______________________________________                                         Com-  Herbicidal effects                                                       pound Barnyard- Large    Smart Pig- Lambs-                                                                               Rice                                 No.   grass     crabgrass                                                                               weed  weed quaters                                                                              flatsedge                            ______________________________________                                          58   4         5        5     5    5     5                                     59   4         5        5     5    5     5                                     63   3         5        5     5    5     5                                     64   3         5        5     5    5     5                                     67   5         5        5     5    5     5                                     71   3         5        5     5    5     5                                     76   3         5        5     5    5     5                                     81   4         5        5     5    5     5                                     95   5         5        4     5    5     5                                    103   3         5        5     5    5     5                                    107   3         5        5     5    5     5                                    108   3         5        5     5    5     5                                    112   5         5        5     5    5     5                                    113   3         5        5     5    5     5                                    114   4         5        5     5    5     5                                    123   3         5        5     5    5     5                                    128   5         5        5     5    5     5                                    129   5         5        4     5    5     5                                    130   5         5        5     5    5     5                                    133   5         5        5     5    5     5                                    141   5         5        5     5    5     5                                    142   4         5        5     5    5     5                                    ______________________________________                                    

Text Example 8 Herbicidal test in the foliage treatment of upland field

Into a 120 cm² plastic pot, upland field soil was filled, and seeds of barnyardgrass, large crabgrass, smart weed, pigweed, lambsquater and rice flatsedge, were sown, and grown in a green house until barnyardgrass grew to the 3 leaf stage. When barnyardgrass reached the 3 leaf stage, a wettable powder of each test compound prepared in accordance with Formulation Example 1 was diluted with water in an amount of 100 liter/10a and applied to the foliage of the plants from above by a small size spray at a dose of 400 g/10a of the active ingredient. After the application, the pot was left in a green house for 21 days, and then the herbicidal effects were evaluated in accordance with the standards identified in Table 3. The results are shown in Table 11.

                  TABLE 11                                                         ______________________________________                                         Herbicidal effects                                                             Com-                                       Rice                                pound Barnyard- Large    Smart Pig- Lambs- flat-                               No.   grass     crabgrass                                                                               weed  weed quarters                                                                              sedge                               ______________________________________                                         57    4         5        5     5    5      5                                   58    5         5        5     5    5      5                                   59    5         5        5     5    5      5                                   60    4         5        5     5    5      5                                   61    5         5        5     5    5      5                                   63    5         5        5     5    5      5                                   64    5         5        5     5    5      5                                   67    5         5        5     5    5      5                                   68    5         4        5     5    5      5                                   69    5         5        5     5    5      5                                   70    5         5        5     5    5      5                                   71    5         5        5     5    5      5                                   72    5         5        5     5    5      5                                   73    4         4        5     5    5      5                                   76    4         5        5     5    5      5                                   77    4         4        5     5    5      5                                   80    4         4        5     5    5      5                                   81    5         5        5     5    5      5                                   84    5         5        5     5    5      5                                   85    5         5        5     5    5      5                                   86    5         5        5     5    5      5                                   87    5         5        5     5    5      5                                   88    3         3        5     5    5      5                                   89    3         4        5     5    5      5                                   92    5         4        5     5    5      5                                   93    5         5        5     5    5      5                                   94    4         5        5     5    5      5                                   95    5         5        5     5    5      5                                   97    5         5        5     5    5      5                                   98    5         5        5     5    5      5                                   99    4         5        5     5    5      5                                   102   4         4        5     5    5      5                                   103   5         5        5     5    5      5                                   104   4         5        5     5    5      5                                   105   4         5        5     5    5      5                                   106   4         4        5     5    5      5                                   107   5         5        5     5    5      5                                   108   5         5        5     5    5      5                                   109   5         5        5     5    5      5                                   110   5         5        5     5    5      5                                   111   4         5        5     5    5      5                                   112   5         5        5     5    5      5                                   113   5         5        5     5    5      5                                   114   5         5        5     5    5      5                                   123   5         5        5     5    5      5                                   123   5         5        5     5    5      5                                   125   5         5        5     5    5      5                                   126   5         5        5     5    5      5                                   127   5         5        5     5    5      5                                   128   5         5        5     5    5      5                                   129   5         5        5     5    5      5                                   130   5         5        5     5    5      5                                   132   5         5        5     5    5      5                                   133   5         5        5     5    5      5                                   136   5         4        5     5    5      5                                   139   4         5        5     5    5      5                                   141   5         5        5     5    5      5                                   142   5         5        5     5    5      5                                   144   4         5        5     5    5      5                                   ______________________________________                                     

We claim:
 1. A 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) compound having the formula: ##STR40## wherein Y which may be the same or different, represents chlorine, bromine, fluorine, hydroxyl, lower alkyl, lower alkoxy which may be substituted by chlorine, bromine or fluorine, lower alkenyloxy which may be substituted by chlorine, bromine or fluorine, lower alkynyloxy, phenoxy, lower cycloalkyloxy, lower alkoxycarbonyl-lower alkenyloxy, lower alkylthiocarbonyl-lower alkyloxy, lower alkynyloxycarbonyl-lower alkyloxy, benzyloxycarbonyl-lower alkyloxy, trifluoromethyl, benzyloxy which may be substituted by chlorine or lower alkyl, lower alkenyl, cyano-lower alkyl, lower alkylcarbamoyloxy, benzyl which may be substituted by one or two lower alkyl, lower alkoxy-lower alkyl, lower alkynyloxy-lower alkyl, lower cycloalkylmethyloxy which may be substituted by chlorine, bromine or fluorine, lower alkoxy-lower alkyloxy, phenethyloxy, lower cycloalkyloxycarbonyl-lower alkyloxy, pyrrolidinocarbonyl, phenylcarbonyl which may be substituted by lower alkyl, ##STR41## wherein R₁ is hydrogen, lower alkyl, phenyl, lower cycloalkyl, lower alkoxy-lower alkyl, lower alkoxycarbonyl-lower alkyl or ##STR42## (wherein R₂ is hydrogen or lower alkoxy), X is oxygen or sulfur, ##STR43## (wherein R₃ is lower alkyl, lower alkenyl or lower alkynyl, and m is 0 or 2), ##STR44## wherein R₄ is hydrogen or lower alkyl, and R₅ is hydrogen, lower alkyl, lower alkoxy-lower alkyl, tetrahydrofurfuryl, lower alkoxy-lower alkyloxy-lower alkyl, lower alkoxycarbonyl-lower alkyl or N═C(CH₃)--R₆ (wherein R₆ is lower alkyl or phenyl), --NHR₇ (wherein R₇ is lower alkylcarbonyl or lower alkoxycarbonyl-lower alkyl), ##STR45## (wherein R₈ is hydrogen or lower alkyl, and R₉ is lower alkoxy, lower cycloalkyloxy or pyrrolidinyl), or ##STR46## (wherein X is as defined above); n is an integer or from 0 to 3; and X is oxygen or sulfur.
 2. The compound according to claim 1, wherein Y is chlorine, bromine or fluorine, lower alkoxy which may be substituted by chlorine, bromine or fluorine, lower alkenyloxy which may be substituted by chlorine, bromine or fluorine, lower alkynyloxy, phenoxy, benxyloxy which may be substituted by chlorine or lower alkyl, ##STR47## wherein R₁ is hydrogen, lower alkyl, phenyl, lower cycloalkyl, lower alkoxy-lower alkyl, lower alkoxycarbonyl-lower alkyl or ##STR48## (wherein R₂ is hydrogen or lower alkoxy), X is oxygen or sulfur, ##STR49## wherein R₄ is hydrogen or lower alkyl, and R₅ is hydrogen, lower alkyl, lower alkynyl, benzyl, lower alkoxy-lower alkyl, tetrahydrofurfuryl, lower alkoxy-lower alkyloxy-lower alkyl, lower alkoxycarbonyl-lower alkyl, lower cycloalkyl, or --N═C(CH₃)R₆ (wherein R₆ is lower alkyl or phenyl).
 3. The compound according to claim 1, which has the formula: ##STR50## wherein A is hydrogen, chlorine, bromine or fluorine, B is chlorine, bromine or fluorine, and R₅ is hydrogen, lower alkyl, lower alkynyl, benzyl, lower alkoxy-lower alkyl, tetrahydrofurfuryl, lower alkoxy-lower alkyloxy-lower alkyl, lower alkoxycarbonyl-lower alkyl, lower cycloalkyl, or --N═C(CH₃)R₆ (wherein R₆ is lower alkyl or phenyl).
 4. The compound according to claim 1, which has the formula: ##STR51## wherein A is hydrogen, chlorine, bromine or fluorine, B is chlorine, bromine or fluorine, and R₁₀ is hydrogen, lower alkyl, lower alkynyl, lower alkoxy-lower alkyl, lower alkoxy-lower alkyloxy-lower alkyl, or tetrahydrofurfuryl.
 5. The compound according to claim 1, which has the formula: ##STR52## wherein A is hydrogen, chlorine, bromine or fluorine, B is chlorine, bromine or fluorine, and R₁ is hydrogen, lower alkyl, phenyl, lower cycloalkyl, lower alkoxy-lower alkyl, lower alkoxycarbonyl-lower alkyl or ##STR53## (wherein R₂ is hydrogen or lower alkoxy).
 6. The compound according to claim 1, which has the formula: ##STR54## wherein .[.Hal is chlorine, bromine or fluorine, and.]. R₁₁ is hydrogen or lower alkyl.
 7. A herbicidal composition comprising a herbicidally effective amount of a compound of the formula I as defined in claim 1 and a carrier.
 8. A 9-phenylimino-8-thia-1,6-diazabicyclo[4.3.0]nonane-7-(one or thione) compound having the formula: ##STR55## wherein Y is at least one halogen and a group represented by the formula: ##STR56## wherein R₈ is hydrogen or lower alkyl, and R₉ is lower alkoxy, lower cycloalkyloxy or pyrrolidinyl; X is oxygen or sulfur, and n is an integer from 2 to
 3. 9. The compound according to claim 8, wherein R₉ is lower alkoxy.
 10. The compound according to claim 8, wherein n is 3 having two chlorine or fluorine radicals and one radical of the formula ##STR57## wherein R₈ is hydrogen or lower alkyl, and R₉ is lower alkoxy, lower cycloalkoxy or pyrrolidinyl.
 11. The compound according to claim 9, wherein n is an integer from 2 to
 3. 12. The compound according to claim 11, wherein n is 3 having two chlorine or fluorine radicals and one radical of the formula: ##STR58## wherein R₈ is hydrogen or lower alkyl, and R₉ is lower alkoxy, lower cycloalkoxy or pyrrolidinyl. .Iadd.
 13. The compound according to claim 6, wherein R₁₁ is ethyl. .Iaddend. .Iadd.14. The compound according to claim 6, wherein R₁₁ is hydrogen. .Iaddend. .Iadd.15. The compound according to claim 6, wherein R₁₁ is isopropyl. .Iaddend. 